When Was Extraversion and Introversion Discovered?

History. Extraversion and introversion were popularised by Swiss psychoanalyst Carl Jung (1875-1961) in 1921. In Psychological Types, Jung described how extraverts engage with external stimuli (Jung, 1921).

Who discovered extraversion and introversion?

Carl Jung was one of the first people to define the terms introvert and extrovert in a psychological context. According to Jung (1910; 1923), personality is based on four pairs of opposing types.

Who discovered introversion?

For a bit of backstory, the terms 'introvert' and 'extrovert' were first coined by psychologist Carl Jung in the early 1900s, but it was psychologist Hans Eysenck who further elaborated on them in the 1950s and '60s.